# CVE-2024-53270

## Summary

- **CVE ID:** CVE-2024-53270
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-670
- **Published:** Dec 18, 2024
- **Last Modified:** Mar 13, 2026

## Description

Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions `sendOverloadError` is going to assume the active request exists when `envoy.load_shed_points.http1_server_abort_dispatch` is configured. If `active_request` is nullptr, only onMessageBeginImpl() is called. However, the `onMessageBeginImpl` will directly return ok status if the stream is already reset leading to the nullptr reference. The downstream reset can actually happen during the H/2 upstream reset. As a result envoy may crash. This issue has been addressed in releases 1.32.3, 1.31.5, 1.30.9, and 1.29.12. Users are advised to upgrade. Users unable to upgrade may disable `http1_server_abort_dispatch` load shed point and/or use a high threshold.

## Affected Products

- envoyproxy — envoy (>= 1.32.0, < 1.32.3)
- envoyproxy — envoy (>= 1.31.0, < 1.31.5)
- envoyproxy — envoy (>= 1.30.0, < 1.30.9)
- envoyproxy — envoy (< 1.29.12)

## References

- [CNA](https://github.com/envoyproxy/envoy/security/advisories/GHSA-q9qv-8j52-77p3)
- [CNA](https://github.com/envoyproxy/envoy/pull/37743/commits/6cf8afda956ba67c9afad185b962325a5242ef02)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.70%
- **EPSS Percentile:** 51.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._